Characterization of corners of curvilinear segment
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United States of America Patent
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Jun 6, 2000
Grant Date -
N/A
app pub date -
Jun 25, 1997
filing date -
Jun 25, 1997
priority date (Note) -
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status (Latency Note)
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Abstract
A system determines discontinuities on a drawn curve. Local tangent values for a curvilinear segment are generated by determining the most likely tangent value for all points on the segment and by acting on a sampling of points around the current point whose tangent is to be determined. A robust statistical estimator is then applied to all angle values generated for the sample set to determine the likely intended tangent direction of the current focal point. The system then selects points with significant changes in tangent values to determine curve discontinuities such that the corners of the segment can be derived.
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